---
id: CVE-2026-31435
title: 'netfs: Fix read abandonment during retry'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netfs: Fix read abandonment during retry

  Under certain circumstances, all the remaining subrequests from a read
  request will get abandoned during retry.  The abandonme…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <
    3e5fd8f53b575ff2188f82071da19c977ca56c41
  - >-
    Linux >= ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <
    8f2f2bd128a8d9edbc1e785760da54ada3df69b7
  - >-
    Linux >= ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <
    7e57523490cd2efb52b1ea97f2e0a74c0fb634cd
  - Linux 6.12
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:09:13.729814Z'
published: '2026-04-22'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:09:59.945Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-31435'
references:
  - url: 'https://git.kernel.org/stable/c/3e5fd8f53b575ff2188f82071da19c977ca56c41'
  - url: 'https://git.kernel.org/stable/c/8f2f2bd128a8d9edbc1e785760da54ada3df69b7'
  - url: 'https://git.kernel.org/stable/c/7e57523490cd2efb52b1ea97f2e0a74c0fb634cd'
tags:
  - cve.org
epss: 0.00512
epssPercentile: 0.4234
ingestedAt: '2026-10-16T17:24:46.652Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

netfs: Fix read abandonment during retry

Under certain circumstances, all the remaining subrequests from a read
request will get abandoned during retry.  The abandonment process expects
the 'subreq' variable to be set to the place to start abandonment from, but
it doesn't always have a useful value (it will be uninitialised on the
first pass through the loop and it may point to a deleted subrequest on
later passes).

Fix the first jump to "abandon:" to set subreq to the start of the first
subrequest expected to need retry (which, in this abandonment case, turned
out unexpectedly to no longer have NEED_RETRY set).

Also clear the subreq pointer after discarding superfluous retryable
subrequests to cause an oops if we do try to access it.

## Affected

- `Linux >= ee4cdf7ba857a894ad1650d6ab77669cbbfa329e < 3e5fd8f53b575ff2188f82071da19c977ca56c41`
- `Linux >= ee4cdf7ba857a894ad1650d6ab77669cbbfa329e < 8f2f2bd128a8d9edbc1e785760da54ada3df69b7`
- `Linux >= ee4cdf7ba857a894ad1650d6ab77669cbbfa329e < 7e57523490cd2efb52b1ea97f2e0a74c0fb634cd`
- `Linux 6.12`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.